Glow plug relay wiring

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alexanderfoti
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Glow plug relay wiring

Post by alexanderfoti » Thu Jun 25, 2015 12:55 pm

Hi all

Im trying to wire up a glow plug relay from a 406 HDI to work on my kubota 850.

Looking at this diagram from a chinese supplier, it seemed like it should be straight forward:

Image

Pin 1 to ground, pin 3 to sw12v+ pin 4 to starter motor and pin 5 to dash light. 2 large posts on the right to 12v and Glow plugs.

It arrived and that doesnt work.

Looking up the haynes manual for a 406 HDI, this is the wiring for the relay:

Image

The glow plug relay is top left.

Pin 1 is ground, Pin 3 is sw 12v

Pin 4 and 5 go to the ECU. Applying 12v to these does nothing. The only thing I can get it to do is latch the relay permanently.

Here is what it looks like inside:

Image Image

Any ideas?

UAofE
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Re: Glow plug relay wiring

Post by UAofE » Thu Jun 25, 2015 5:06 pm

Use one from a Mercedes. Its compact, weatherproof and only needs 3 wires apart from the glowplug.

Image
2006 Honda Rebel
Kubota OC95, Comet 44C/44D

alexanderfoti
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Re: Glow plug relay wiring

Post by alexanderfoti » Thu Jun 25, 2015 5:14 pm

Which one?

Also, mercedes have the glow plugs wired one by one, not all in parallel like the Kubota.

Nanko
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Re: Glow plug relay wiring

Post by Nanko » Thu Jun 25, 2015 5:59 pm

This controler is designed for pre and postheating, glowplugs are energised till cooling liquid reaches 60 C. (Pin 2)
Also the HDI Plugs are quick(er) heating.
The older psa controlers are ok, < 1994 engine XUD7/9 the other types are also postheating.
But maybe not connecting pin2 makes the HDI unit think engine is hot, never tested that.
Also you have to start (apply voltage on pin4) before the complete heating cyclus starts.
peugeot TUD5 - MOTO GUZZI 16.500 km so far

alexanderfoti
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Re: Glow plug relay wiring

Post by alexanderfoti » Thu Jun 25, 2015 6:01 pm

Thanks Nanko.

That's not a problem. .Post heating would probably help on mine.

Pin 2 on the connector is present, but isn't wired internally, or on the connector that was chopped off.

I have 2, thinking the first one was faulty. I must be missing something.

JohanWinas
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Re: Glow plug relay wiring

Post by JohanWinas » Sun Jul 22, 2018 5:24 pm

Did you ever get the Peugeot relay working?
I am struggling with the same part right now and cant get it to operate ok.

alexanderfoti
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Re: Glow plug relay wiring

Post by alexanderfoti » Sun Jul 22, 2018 5:28 pm

I did not. I ended up using a generic 12v timer on ebay and a beefy relay.

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